作 者：朱华跃
影响因子：3.299
刊物名称：Separation and Purification Technology
出版年卷：2017,179:184–193
文章摘要：Novel magnetic bayberry-like Fe3O4/Bi2S3 microspheres (Fe3O4/Bi2S3 MSs) combining highly effective adsorption and photocatalytic regeneration were prepared by a facile hydrothermal method. The resultant Fe3O4/Bi2S3 MSs were characterized by XRD, SEM, EDS, VSM, BET and DRS. Fe3O4/Bi2S3 MSs possessed a relative large surface area of 36.0 m2 g1 and narrow pore size distribution around 4.72 nm. The equilibrium and kinetics of adsorption process followed the Langmuir isotherm model and pseudo-secondorder kinetic model, respectively. Maximum adsorption capacity of CR as 92.24 mg g1 was achieved on Fe3O4/Bi2S3 MSs, while only 66.28 mg g1 was found on Bi2S3 MSs. High saturation magnetization, low coercivity and remnant magnetization values of Fe3O4/Bi2S3 MSs indicated that easy separation and fast re-dispersion in aqueous solution can be realized. What’s more important, Fe3O4/Bi2S3 MSs with a stronger absorption in the visible light region can be regenerated by photocatalysis under simulated solar light irradiation. Fe3O4/Bi2S3 MSs also showed excellent stability and reusability for continuous removal of Congo red dye by synergistic adsorption and photocatalytic regeneration. As a result, Fe3O4/Bi2S3 MSs provided effective and conveniently recyclable materials for environmental remediation by means of providing the facile preparation, easy magnetic separation, high adsorption, and simple regeneration.
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